package net.sourceforge.fenixedu.presentationTier.Action.teacher;

import java.util.Arrays;
import java.util.Collections;
import java.util.List;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import net.sourceforge.fenixedu.applicationTier.Servico.exceptions.FenixServiceException;
import net.sourceforge.fenixedu.dataTransferObject.InfoExam;
import net.sourceforge.fenixedu.dataTransferObject.InfoExecutionCourse;
import net.sourceforge.fenixedu.dataTransferObject.InfoSiteCommon;
import net.sourceforge.fenixedu.dataTransferObject.InfoSiteExamExecutionCourses;
import net.sourceforge.fenixedu.dataTransferObject.TeacherAdministrationSiteView;
import net.sourceforge.fenixedu.domain.exceptions.DomainException;
import net.sourceforge.fenixedu.presentationTier.Action.base.FenixDispatchAction;
import net.sourceforge.fenixedu.presentationTier.Action.resourceAllocationManager.utils.ServiceUtils;

import org.apache.commons.beanutils.BeanComparator;
import org.apache.commons.collections.comparators.ReverseComparator;
import org.apache.struts.action.ActionError;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.DynaActionForm;

public class DistributeStudentsByRoomDispatchAction extends FenixDispatchAction {

    public ActionForward prepare(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response)
	    throws Exception {

	final DynaActionForm distributionExam = (DynaActionForm) form;
	final Integer evaluationCode = Integer.valueOf((String) distributionExam.get("evaluationCode"));
	final Integer executionCourseCode = Integer.valueOf((String) distributionExam.get("objectCode"));

	final InfoSiteExamExecutionCourses infoSiteExamExecutionCourses = new InfoSiteExamExecutionCourses();
	final Object[] args = { executionCourseCode, new InfoSiteCommon(), infoSiteExamExecutionCourses, null, evaluationCode,
		null };

	final TeacherAdministrationSiteView siteView = (TeacherAdministrationSiteView) ServiceUtils.executeService(
		"TeacherAdministrationSiteComponentService", args);

	final InfoExam infoExam = infoSiteExamExecutionCourses.getInfoExam();
	final List<InfoExecutionCourse> infoExecutionCourses = infoSiteExamExecutionCourses.getInfoExecutionCourses();

	int totalAttendStudents = 0;
	for (final InfoExecutionCourse infoExecutionCourse : infoExecutionCourses) {
	    totalAttendStudents += infoExecutionCourse.getNumberOfAttendingStudents().intValue();
	}

	Collections.sort(infoExam.getAssociatedRooms(), new ReverseComparator(new BeanComparator("capacidadeExame")));

	request.setAttribute("infoExam", infoExam);
	request.setAttribute("siteView", siteView);
	request.setAttribute("objectCode", executionCourseCode);
	request.setAttribute("evaluationCode", evaluationCode);
	request.setAttribute("attendStudents", Integer.valueOf(totalAttendStudents));

	return mapping.findForward("show-rooms");
    }

    public ActionForward distribute(ActionMapping mapping, ActionForm form, HttpServletRequest request,
	    HttpServletResponse response) throws Exception {

	final DynaActionForm distributionExam = (DynaActionForm) form;
	final Integer evaluationCode = Integer.valueOf((String) distributionExam.get("evaluationCode"));
	final Integer executionCourseCode = Integer.valueOf((String) distributionExam.get("objectCode"));
	final Boolean distributeOnlyEnroledStudents = Boolean.valueOf((String) distributionExam.get("enroll"));
	final List rooms = Arrays.asList((Integer[]) distributionExam.get("rooms"));

	final Object[] args = { executionCourseCode, evaluationCode, rooms, Boolean.FALSE, distributeOnlyEnroledStudents };
	try {
	    ServiceUtils.executeService("WrittenEvaluationRoomDistribution", args);
	    request.setAttribute("objectCode", executionCourseCode);
	    request.setAttribute("evaluationCode", evaluationCode);
	    return mapping.findForward("show-distribution");

	} catch (DomainException e) {
	    ActionErrors actionErrors = new ActionErrors();
	    actionErrors.add("error", new ActionError(e.getKey()));
	    saveErrors(request, actionErrors);
	    return prepare(mapping, form, request, response);
	} catch (FenixServiceException e) {
	    ActionErrors actionErrors = new ActionErrors();
	    actionErrors.add("error", new ActionError(e.getMessage()));
	    saveErrors(request, actionErrors);
	    return prepare(mapping, form, request, response);
	}
    }

}